Mustang MonthlyHow To Paint Body
How To Install Shelby Side Scoops onto a Mustang
Installing Shelby Side Scoops and Brake Ducting Kit on Any 1965-1966 Mustang Fastback
Jason White was building a Shelby clone for a customer, and a must-have on the car was a set of side scoops both for its hot looks and to duct ambient air to the rear brakes.
Scott Drake makes a “concours reproduction” of the scoops, originally used on 1966 Shelby G.T. 350s. Drake used new tooling to hand lay fiberglass, which comes finished in a smooth white primer, ready for prep and paint. What’s the big deal? Unlike other reproductions, Drake’s new scoops are thicker for durability and they can be riveted on like the originals or bonded on for owners who don’t want to drill holes in their quarter panels.
Enthusiasts can install these scoops with or without ducting to the rear brakes. Tony Branda offers a duct kit that includes fiberglass air inlets and outlets, plus hoses that fit 1965-1966 Mustang fastbacks. (This brake duct kit does not fit coupes and convertibles because the quarter windows get in the way.)
Jason showed us how to install Drake’s new side scoops the old-school way, with rivets, and new school, with 3M double-sided tape. He also drilled holes for the ductwork to make the scoops fully functional.
1. We were impressed with the quality and fit of Scott Drake’s new reproduction Shelby fiberglass side scoops. They fit with no fiberglass or bodywork necessary, and are ready for paint.
2. Drake’s Shelby side scoops are thick like the original, which is important if you use rivets to attach the scoops via the folds on the backside.
3. Tony Branda’s brake duct kit consists of one air inlet and one air outlet per side, plus a hose, which you cut in half—one per side, to duct outside air to rear brakes. Branda’s kit requires rounding up rivets and two adjustable clamps, size 2 1/4 inches to 3 1/4 inches.
4. If you don’t want to drill holes in the quarter panels, the scoops won’t duct air to the rear brakes, but you can install them in minutes. First, install double-side 3M tape to the inside edges and just press the scoop in place
5. Voila, the scoop is installed and ready for paintwork.
6. To install the brake duct kit, begin by outlining the circumference of one air inlet housing. You can position this air inlet dead center or the lower corner, as Jason has chosen here. The hole will be difficult to see behind the scoop.
7. The inside diameter of the exterior air inlet is about 2 1/2 inches, so use a hole-cutting tool this size.
8. File off any burrs.
9. Shelby-American mounted the wheelwell air inlet high on the wheelwell, but Jason preferred to mount it low, as seen here.
10. Each wheelwell air inlet is 3 inches in diameter, but installation is the same. Inscribe and mark a center, and drill out with a hole cutter.
11. The hole in the rear wheelwell housing exited here.
12. You will need self-drilling screws 3/4 inches long that are slightly smaller in diameter than the rivets.
13. At equal intervals, drill three screws through the circumference of the air inlet and through the quarter panel.
14. Pull one screw at a time and replace with a rivet.
15. The fiberglass air inlet from the inside will look like this when finished.
16. Jason prefers to cushion each wheelwell air inlet with a butyl-based sealer. You can also insert a metal screen in the opening to help keep out road dust and debris.
17. Attach the inside air inlet with three screws and replace them with rivets, as with the other vent.
18. Jason held the scoop in place with his left hand while he drilled a hole through the inside of the body with his right hand and into the inner lip on the back of the scoop. He then riveted the scoop in place.
19. Cut the hose in half by first cutting the inside wire with wire cutters, followed by a razor blade for the plastic.
20. Slide the adjustable clamp over each end of the hose and each air inlet and tighten the screw.
21. The scoop is ready for body prep and paint.